O.K. You have to go back and tell her you've thought it over and you're wondering why she brought it up.Test the waters with a few questions to see how she feels about it.If you get positive answers and if she would be willing to help ,then tell her you want to try.Put the ball back in her court,make it seem like its her idea.Tell her, "I'm doing this because I like you,you asked me and I trust you'll keep it between us only" .I would have her lock the shop up first.You should be able to tell how serious she is.